Ye Ji enters a 19+ dating show with a huge cash prize for her boyfriend, who lost everything. The only way to win the 1.9 billion prize is to spend the night with another man. There, she meets Jae Hyeon, her first love, and Do Hyeok, the ex-husband she broke up with after an affair. Between true love, the 1.9 billion prize, and her own desires—what will Ye Ji choose?